Hilary Duff looked effortlessly cool as she stepped out to run errands with her daughter Banks on Saturday.The 34-year-old actress sported a graphic white T-shirt and trendy light blue denim jeans with rips on the knees.The doting mom had her hands full, holding three beverages and a cellphone in one hand, and her three-year-old daughter's hand in the other, while navigating the parking lot. Casual:Hilary Duff was effortlessly cool as she stepped out to run errands with her daughter Banks on SaturdayThe singer was comfortable for the outing, slipping her feet into a pair of Birkenstock sandals.